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[PATCH] update some mm/ comments

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Let's try to keep mm/ comments more useful and up to date. This is a start.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nick Piggin
2006-09-25 23:31:35 -07:00
committed by Linus Torvalds
parent e5ac9c5aec
commit da6052f7b3
3 changed files with 64 additions and 47 deletions
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8
mm/filemap.c
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@ -599,8 +599,8 @@ void fastcall __lock_page_nosync(struct page *page)
* @mapping: the address_space to search
* @offset: the page index
*
* A rather lightweight function, finding and getting a reference to a
* hashed page atomically.
* Is there a pagecache struct page at the given (mapping, offset) tuple?
* If yes, increment its refcount and return it; if no, return NULL.
*/
struct page * find_get_page(struct address_space *mapping, unsigned long offset)
{
@ -987,7 +987,7 @@ page_not_up_to_date:
/* Get exclusive access to the page ... */
lock_page(page);
/* Did it get unhashed before we got the lock? */
/* Did it get truncated before we got the lock? */
if (!page->mapping) {
unlock_page(page);
page_cache_release(page);
@ -1627,7 +1627,7 @@ no_cached_page:
page_not_uptodate:
lock_page(page);
/* Did it get unhashed while we waited for it? */
/* Did it get truncated while we waited for it? */
if (!page->mapping) {
unlock_page(page);
goto err;